Hah! I actually know completely what you mean... I had a small issue which led me to ban four or five journals from my own and any communities I ran about a year ago. (Heaven forbid, I had removed someone from my flist because their constant ED talk drove me up a wall as a former bulimic. It became a huge "You're persecuting me!" drama. Oy.)

Sometimes the only solution is banning all their incarnations and biding your time. I think eventually without stimulation they lose interest. Ironically that's the approach I'm taking to a similar drama blowup going on right now on a message board I belong to, heh. I used to get more involved, firing back messages, getting myself upset, but yeah... in perspective to the rest of life it means so little. I'd love to have the free time of some of these people...